100% Pure L-Citrulline 500 Milligrams by NutraBio — Ingredients, Evidence & Safety

🟢 100/100

This product looks safe

No ingredients exceed tolerable upper intake levels
Limited research evidence available for ingredients

B Label Compliance Grade

Product Label

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Label Data

4 V-Cap(s) Serving Size

37 Servings

Amino acid/Protein Product Type

0% Evidence Coverage

Supplement Facts — Evidence Check

L-Citrulline

2000 mg

📊 Market median: 2000.0mg (275 products)

Median 2000.0mg This product: 2000mg

Other Ingredients

Vegetable Capsule

Label Claims — Verification

❓ All Other

❓ Structure/Function

All Other (97% of products) Structure/Function (91% of products) Nutrient (29% of products) No Claim (2% of products)

Target Groups

Vegetarian Adult (18 - 50 Years) Kosher No Allergies Gluten Free

Product Information

📋 Directions for Use

4 capsules 1-2x daily Suggested Use: As a dietary supplement, take 4 capsules (2000 mg) 1 to 2 times daily or as directed by your physician.

⚠️ Warnings & Precautions

Warning: NOT INTENDED FOR USE BY PERSONS UNDER THE AGE OF 18. KEEP OUT OF THE REACH OF CHILDREN.

If you are pregnant, breast feeding, have known medical conditions (including kidney or liver disease) or are taking prescription or OTC medication(s) consult with your health care practitioner before using this product.

🧪 Formulation Notes

No Fillers No Excipients No Additives

Free of harmful impurities

VEGETARIAN

ALLERGEN FREE

~ NON-GMO GLUTEN FREE ~ BSE/TSE FREE

This product is Kosher, Vegetarian, Hypoallergenic, Non-GMO, Gluten Free, & BSE/TSE Free.

This product is Kosher, Vegetarian, Hypoallergenic, Non-GMO, Gluten Free, & BSE/TSE Free. No added sugars, salt, preservatives, salicylates, or artificial color, flavor or fragrance.

This product is Kosher, Vegetarian, Hypoallergenic, Non-GMO, Gluten Free, & BSE/TSE Free.

Additional Information

Manufactured in a GMP & FDA inspected facility FDA Registration: 16906175560

Made in a GMP & FDA inspected facility

Free Form Amino Acid

Pharmaceutical Grade HPLC Lab Tested for Potency

37 servings

500 milligrams

True Label Full label disclosure

Vegetable Capsule

KQ Kyowa Quality

STORE IN A COOL DRY PLACE.

NUTRABIO Since 1996

23606-007 B20078-002

Made in USA

Product Details

UPC / SKU 6 49908 23606 9

DSLD Entry Date 2015-09-25

Product Type Amino acid/Protein

Form Capsule

Brand NutraBio

DSLD ID 50976

Data Updated 2026-04-11

Research Evidence

12 Research Sources

45 Avg Quality Score

6 Rct

5 Clinical Trial

1 Meta Analysis

C Effect of food sources of nitrate, polyphenols, L-arginine and L-citrulline on endurance exercise performance: a systematic review and meta-analysis of randomised controlled trials

Meta Analysis Journal of the International Society of Sports Nutrition 2021

PubMed DOI

C Effects of L-Citrulline Supplementation on Endothelial Function and Blood Pressure in Hypertensive Postmenopausal Women.

Rct Nutrients

PubMed DOI

C Effects of Acute Citrulline Malate Supplementation on CrossFit® Exercise Performance: A Randomized, Double-Blind, Placebo-Controlled, Cross-Over Study.

Rct Nutrients

PubMed DOI

C Impact of L-Citrulline Supplementation and HIIT on Lipid Profile, Arterial Stiffness, and Fat Mass in Obese Adolescents with Metabolic-Dysfunction-Associated Fatty Liver Disease: A Randomized Clinical Trial.

Rct Nutrients

PubMed DOI

C Effect of L-Citrulline Supplementation on NAFLD in Adolescents With Obesity

Clinical Trial ClinicalTrials.gov 2021

ClinicalTrials.gov

C Effects of L-Citrulline or Citrulline-malate on Neuromuscular Performance in Resistance-trained Adults

Clinical Trial ClinicalTrials.gov 2022

ClinicalTrials.gov

C Acute effects of Nitrosigine® and citrulline malate on vasodilation in young adults.

Rct Journal of the International Society of Sports Nutrition

PubMed DOI

C Effects of Combined Versus Single Supplementation of Creatine, Beta-Alanine, and L-Citrulline During Short Sprint Interval Training on Basketball Players' Performance: A Double-Blind Randomized Placebo-Controlled Trial.

Rct International journal of sports physiology and performance

PubMed DOI

C Acute effects of combined supplementation of L-arginine and citrulline malate on aerobic, anaerobic, and CrossFit exercise performance.

Rct Scientific reports

PubMed DOI

C L-Citrulline in Peripheral Artery Disease

Clinical Trial ClinicalTrials.gov 2016

ClinicalTrials.gov

View all evidence for Citrulline →